For works of this author written under his own name, search also under Allen, Henry Wilson, 1912-  For works written under another pseudonym, search also under Fisher, Clay, 1912-  and Allen, Heck, 1912-1991  

Joint pseudonym of Douglas Adams, Graham Williams and David Fisher. For works of these authors written under their own names, search also under: Adams, Douglas, 1952-  Williams, Graham, d. 1990,  Fisher, David, 1929-2018